Self-adjusting pump-plunger.



PATENTED FEB. 7, 1905.

J. REID. SELF ADJUSTING PUMP PLUNGER.

APPLIOATION FILED AUG. 22: 1904.

WITNESSES.

ATTORNEYS TJTNITED STATES J O H N REID, OF NEV Patented February 7, 1905.

YORK, N. Y.

SELF-ADdUSTlNG PUMP-PLUNGER.

SPECIFICATION forming p r f Letters Patent N 782,053, dated February 7, 1905.

Application filed August 22,1904. Serial No. 221,662.

1'!) 11.71 who/)1, it 7100 concern.-

Be it known that I, Jonx Run), a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Self-Adjusting Pump- Plunger, of which the following is a full, clear, and exact description.

My invention relates to self-adjusting pumpplnngers having metal or fiber packing, and especially adapted for hot-water pumps in heating systems.

The purpose of the invention is to so construct the plunger that it will always remain in the center of the water-cylinder of the pump, thereby providing a water-cushion between the outer periphery of the plunger and the inner surface of the cylinder, thus preventing any wear on the latter.

A further purpose of the invention is to so construct the body of the plunger that withdrawing-clamps may be readily applied to draw the plunger from the piston-rod when necessary without disturbing other portions of the pump.

Another purpose of the invention is to provide lugs upon the inner face of the sections of the bull-ring, which lugs serve primarily to keep the sections in position.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate correspomling parts in all the figures.

Figure l is an outer face view of the plunger with the cap-plate removed. Fig. 2 is a section taken practically on the line 2 2 of Fig. l. Fig. 3 is a perspective view of a packingring employed in connection with the plunger, and Fig. 4 is a perspective view of the bullring employed.

The body of the plunger consists of an inner head-plate it), having an opening therein to receive the reduced outer end 11 of the pistonrod 12, the said reduced end 11 of the pistonrod passing entirely through the said body and being provided with an external thread at its outer end, and around the opening in the inner head-plate a boss or collar 13 is produced to reinforce the head at such point. A rectangular hub 14: extends outward from the central portion of the inner head-plate 10, and a series of webs or partitions 15 extend from the corner portions of the said hub it, the outer ends of which webs or partitions 15 are more or less rounded oli'. These webs or partitions form series of pockets B, usually four in number, and a series of triangular spaces (1, which separate the pockets, and the walls of two opposingspaces (1 are reinforced by a body of metal lb at their inner contracted portions. in these reinforcing-sections 16 recesses 17 are produced for a purpose to be hereinafter described. The hub It is provided with a bore 18, correspondingin diameter and constituting a continuation of the opening in the inner head-plate 10.

In connection with the body A above described a bull-ring l) is employed. This bullring is in two sections (7 and If, the sections being of equal size, as is shown in Fig. -L. and on the inner face of each section 1/ and (l of the bull-ring l) a segmental rib i9 is formed, (shown in Figs. 1 and l.) and when the sections of the bull-ring are placed in proper position around the web-hub of the body A of the plunger the segmental ribs 19 enter the reinforced walls of the spaces C, as is shown in Fig. l, and prevent the sections of the bullring from shifting on the body. In the further construction of the plunger packingrings E are employed, usually two in munber, and these packing-rings are made of metal or liber or of any suitable material and are adapted to surround the bull-ring l). l lach packing-ring .E is provided with a diagonal cut Qt), so that these rings may expand and contract.

Springs 21 (spiral, coiled, or helical) are located in the pockets B, as is illustrated in Figs. 1 and 2, and these springs have hearing on the hub-section of the body of the plunger and in an outward direction against the sections of the bull-ring, forcing the ring to a firm and expanding engagement with the packing-rings E employed. Preferably the bull-ring is so placed in position that the springs in two pockets will engage with each section of the ring, as clearly illustrated in Fig. 1.

An outer head 22 is made to fit closely to the outer end of the hub of the plunger and to engage with the outer edges of the bullring and the outer packing-ring, extending to the outer periphery of the latter, and this outer cap-plate or head 22 is provided with a central opening through which the outer end of the piston-rod 12 passes. The outer head is held in position by carrying a washer 22 over the outer threaded end of the piston-rod to an engagement with the outer head 22 and then screwing nuts 23 on the outer end of the said piston-rod to an engagement with the washer, as is shown in Fig. 2.

Vhen necessary to remove the plunger from the piston-rod,- the nuts 23 are removed from the said piston-rod 12, and likewise the washer 22 and the outer head or cap-plate 22. The recesses 17 in the reinforced walls of the spaces C between the pockets are then engaged by a draw-clamp or other. suitable tool, and the plunger is withdrawn from the piston-rod and out from the cylinder.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent 1. In a pump-plunger, a body provided with a hub havingaseries of pockets therein open at the periphery of the hub, a bull-ring constructed in sections, which incloses the said hub, lugs on the sections of the bull-ring, adapted to enter spaces between sundry of said pockets, split packing-rings which surround the bull-ring, and springs located in the said pockets, having bearing against the hub and against the sections of the bull-ring.

2. A pump-plunger consisting of an inner head, a rectangular hub extending outward from said inner head, partitions extending outwardly from the corners of the hub, forming a series of pockets open at the outer edge portion of the hub and spaces between the pockets, a bull-ring constructed in sections, surrounding the hub and its partitions, the said pockets being equally directed to the sections of the bull-ring, lugs on the interior of the sections of the bull-ring adapted to enter op posite spaces between the pockets, split packing-rings engaging with the periphery of the bull-ring, and springs located in the said pockets, radially disposed with reference to the hub and having bearing at one end against said hub in an outward direction against the bull-ring.

3. A pump-plunger consisting of an inner head, a rectangular hub extending outward from the said inner head, partitions extending outward from the corners of the hub, forming a series of pockets open at the outer edge portion of the hub, a bull-ring constructed in sections, surrounding the hub and its partitions, the said pockets being equally directed to the sections of the bull-ring, split packingrings engaging with the outer periphery of the bull-ring, and springs located in the said pockets, radially disposed with reference to the hub, having bearing at one end against the said hub in an outward direction against the bull-ring, the said hub and inner head being provided with a bore extending through them, adapted to receive an end portion of a piston-rod, a removable head-plate located at the outer end of the body of the plunger, and lugs located upon the interior of the bull-ring sections, adapted to hold the said sections of the bull-ring in proper position relative to the said hub.

4. In pump-plungers, a body comprising an inner head, a polygonal hub extending from the head, partitions extending from the corners of the hub, forming a series of pockets, and spaces between the pockets, the inner walls of the opposing spaces being reinforced and provided with recesses at their reinforced portions, a sectional bull-ring adapted to surround the said hub, lugs on the bull-ring, which enter the spaces having the reinforced walls, expansible packing-rings located at the exterior of the bull-ring, and springs located in the said pockets. having bearing against the hub and bearing in an outward direction against the bull-ring.

In testimony whereof I have signed my name to this specification in the presence of two sub scribing witnesses.

JOHN REID.

\Vitnesses:

.I. H. REILLY, J. R. MILLER. 

